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Topic (Course) 
Technology 
Type 
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Area of a Kite  Math Open Ref...

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that deals with the area of a kite, (a quadrilateral with two distinct pairs of equal adjacent sides).
The applet shows a kite and the user can reshap...
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Area of a Parallelogram

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[1]

Illustrates and defines the formula for the area of a parallelogram. From Illuminations' IGD: Interactive Geometry Dictionary.
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Area of a Rectangle

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

Illustrates and defines the formula for the area of a rectangle. From Illuminations' IGD: Interactive Geometry Dictionary.
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Area of a Rectangle  Math Ope...

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

A web page and interactive applet showing the ways to calculate the area of a rectangle. The user can drag the vertices of the rectangle and the other points change automatically to ensure it rem...
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Basic Areas  of a Rectangle a...

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[1]

This applet has you manipulate a rectangle and triangle in order to discover the area formulas.
More: lessons, discussions, ratings, reviews,...

Classification of Quadrilatera...

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

An interactive Java illustration that highlights specific properties of various quadrilaterals. Quadrilaterals may be convex, orthodiagonal, cyclic, inscriptible, having parallel or equal sides, equil...
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Classifying Quadrilaterals Vis...

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

In this activity, you will visually explore the relationship between several different quadrilaterals and eventually classify them in the form of a 'family tree'. After an introduction to a square and...
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Congruent Transformation

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

This applet follows descriptions on how to transform any quadrilateral into a parallelogram, rectangle, or triangle based on transformations of the pieces of the quadrilateral.
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Constructing Right Triangles

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

Provides two applets that demonstrate how to construct right triangles with different sets of given information
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Dividing a Quadrilateral

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

This applet demonstrates how to divide a quadrilateral into two equal halves.
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Euclid's Elements, Book 3, Pro...

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

Euclid's proposition shows that opposite angles of a quadrilateral within a circle sum to the measure of two right angles. The guide then examines the structure of the proposition. The To reset the ...
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Euclid's Elements, Book 3, Pro...

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

Euclid's proposition deals with proving equality among quadrilaterals constructed by intersecting lines within a circle. The guide then examines the structure of the proposition. The To reset the ap...
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Euclid's Elements, Book I, Def...

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

Gives Euclid's original definitions of a square, oblong, rhombus, rhomboid, and trapezia and then examines the definitions' validity and durability. To reset the applet, press "r" while your cursor i...
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Explore Interior Angles of Pol...

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

Drag the vertices of a quadrilateral or pentagon, and examine what happens to the angle measures and sum of the interior angles. Java Sketchpad activities, with guiding questions for students.
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Exploring Quadrilaterals

Quadrilaterals (Geometry) 
Sketchpad 
Tool 

[0]

Students explore various types of quadrilaterals, investigating their properties and figuring out how the various shapes relate to each other. The link to the tool itself is to a zip file that cont...
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Geoboard  Coordinate

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

Rectangular geoboard with x and y coordinates.
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Identify These Quadrilaterals

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[2]

This applet asks you to determine the types of quadrilaterals illustrated.
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Math4Mobile: Quad2Go

Quadrilaterals (Geometry) 
Mobile Device 
Tool 

[0]

Quad2Go is an application for cellular mobile phones that offers ways of learning about quadrilaterals by generating examples, observing, and experimenting with examples as the basis for generalized c...
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Midpoint Quadrilateral Notice/...

Quadrilaterals (Geometry) 
TINspire 
Tool 

[0]

Students write what they notice and wonder about a midpoint quadrilateral, and then use TINspire™ technology to add auxiliary lines and justify their conjectures about the midpoint quadrilateral.
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Perimeter of a Quadrilateral

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

This applet demonstrates the rule of the perimeter of a quadrilateral.
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Perimeter of a parallelogram ...

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

A web page and interactive applet show how to compute the perimeter of a parallelogram.
A parallelogram is shown that can be resized by dragging its vertices. As you drag, the perimeter is cont...
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Polygons Unit Quiz

Quadrilaterals (Geometry) 
JavaScript 
Tool 

[2]

Users interactively test their understanding of polygons and area with this unit quiz.
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Problem about a Quadrilateral

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

This applet illustrates what types of inscribed quadrilaterals are created by connecting the midpoints of a quadrilateral.
More: lessons, discussions, ratings, reviews,...

Proof as Discovery: Kite Midpo...

Quadrilaterals (Geometry) 
Sketchpad 
Tool 

[0]

Students investigate and prove a property of kites, and use the proof to make a discovery about other quadrilaterals. The link to the tool itself is to a zip file that contains both the sketch and...
More: lessons, discussions, ratings, reviews,...

Proof as Verification: Areas

Quadrilaterals (Geometry) 
Sketchpad 
Tool 

[0]

Students form a conjecture about the ratio of two areas in a quadrilateral, and use Sketchpad to search for a proof. In the process they verify or disprove their results for two different kinds of ...
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